There are a lot of options in the Free UNIX market at the moment. Everyone's favorite buzzword is Linux, and Sun is in the process of releasing Solaris under a Free Software license. One family, however, receives less attention than it is due. Berkley Software Distribution (BSD) has grown into almost a complete replacement for UNIX, with numerous enhancements. David Chisnall explains why the BSD family has found its way into a large number of systems and what these systems can do for you.

I just don't liked two things: a little lack of emphasis on the wonderful BSDs port system and in the introduction, when he mention about BSDs having its own userland apps, he forgot who the GNU userland aplications found on Linux distros (including almost all developers tools) can be also natively installed on BSD systems.